content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.util;
  
  import io.reactivex.rxjava3.functions.BiFunction;
  
  /**
   * A BiFunction that returns its second parameter; use {@link #instance()} to
   * get a correctly typed (shared) instance.
   *
   * @since 0.16.2
   */
  public enum BiFunctionSecondIdentity implements BiFunction<Object, Object, Object> {
      /** The singleton instance. */
      INSTANCE;
  
      /**
       * Returns a correctly typed instance of the enum's singleton instance.
       * @param <T> the first input value type.
       * @param <U> the second input and result type
       * @return the typed BiFunction (shared) instance.
       */
      @SuppressWarnings({ "unchecked", "rawtypes" })
      public static <T, U> BiFunction<T, U, U> instance() {
          return (BiFunction)INSTANCE;
      }
  
      @Override
      public Object apply(Object t1, Object t2) throws Exception {
          return t2;
      }
  }
  